421243045 has 8 divisors (see below), whose sum is σ = 527469696. Its totient is φ = 322342416.

The previous prime is 421243033. The next prime is 421243073. The reversal of 421243045 is 540342124.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 421243045 - 2⁵ = 421243013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1831377 + ... + 1831606.

It is an arithmetic number, because the mean of its divisors is an integer number (65933712).

Almost surely, 2^421243045 is an apocalyptic number.

It is an amenable number.

421243045 is a deficient number, since it is larger than the sum of its proper divisors (106226651).

421243045 is a wasteful number, since it uses less digits than its factorization.

421243045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3663011.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 421243045 is about 20524.2063183939. The cubic root of 421243045 is about 749.6253210002.

Adding to 421243045 its reverse (540342124), we get a palindrome (961585169).

The spelling of 421243045 in words is "four hundred twenty-one million, two hundred forty-three thousand, forty-five".